When we first met Dexter in 2006, he was a fully formed, thirty-something master of his craft. He had his apartment, his boat, his slides of blood, and an unshakeable routine. Original Sin strips all of that away. We meet Dexter Morgan (played by Patrick Gibson) as he has just graduated high school. He is intelligent, socially awkward, and utterly overwhelmed by his homicidal urges, which he has suppressed for years.
Under the mentorship of his foster father, Harry Morgan, Dexter learns to channel his darkness by targeting only those who truly deserve it. Dexter- Original Sin